Is it possible to disable syntax coloring and intellisense in parts of source code with non-standard C or C++ syntax constructs?

I'm using a C compiler for 8 bit machines, and this compiler is standard C, but has some non standard syntax constructs.

Like the asm keyword ...

    bank_push_bram(); bank_set_bram(fe.bram_bank);

    asm {
        lda $9f25
        pha
        lda $9f24
        pha
        lda $9f23
        pha
        lda $9f22
        pha
        lda $9f21
        pha
        lda $9f20
        pha
    }

    bank_set_brom(CX16_ROM_KERNAL);

Is it possible with a token in a comment line or something, to DISABLE the syntax coloring and intellisense in this asm statement region? Maybe something like this could be possible?

    bank_push_bram(); bank_set_bram(fe.bram_bank);

    // __INTELLISENSE_DISABLE
    asm {
        lda $9f25
        pha
        lda $9f24
        pha
        lda $9f23
        pha
        lda $9f22
        pha
        lda $9f21
        pha
        lda $9f20
        pha
    }
    // _INTELLISENSE_ENABLE

    bank_set_brom(CX16_ROM_KERNAL);

No file, test, or entry point is named. Start by reviewing the extension's handling of C/C++ syntax coloring and IntelliSense alongside the non-standard asm example; done should be a clearly scoped way to suppress both behaviors for a bounded source region.